Slip-socket.



L. E. NEBERGA LL.

SLIP SOCKET. APPLICATION TILED OUT. 24, 1910 Patented Apr. 4, 1911.

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LORAN E. NEBERGALL, OF OMAHA, NEBRASKA.

SLIPSOCKET.

Specification of Letters Patent.

Patented Apr. 4, 1911.

Application filed October 24, 1910. Serial No. 588,876.

To all whom it may concern:

Be it known that I, LORAN E. Nnnjenoann, a citizen of the United States,and a resident of Omaha, in the county of Douglas and State of Nebraska,have invented certain new and useful Improvements in Slip-Sockets, ofwhich the following is a specification.

My invention relates to deep-well. boring and more particularly todevices for use in recovering tools which during the boring of the wellmay become stuck therein through the caving of material on top of them,or from other causes.

It is the object of my invention to provide a device for use in fishingfor such tools, which may be worked over the drill-rope to loosen thecavings without chafing or wearing the rope, which may be guided to thetools by the drill-rope, and which may be engaged with the rope-socketwithout first cutting off the drill-rope which is attached thereto.

In the boring of deep wells for water, oil and the like, the looseningof the material at the bottom of the hole is effected by alternatelyraising and dropping the drill which is the lowermost member of a stringof tools having at the upper end thereof a ropesocket to which isconnected the drill-rope which extends up to the hoisting machinery. Thedrilling tools are from time to time withdrawn from the hole and theloosened material removed from the hole by means of a bucket or bailer.During the drilling operation any material which may cave in from thesides of the hole may wedge the tools therein so that they cannot bewithdrawn by pulling up on the drill-rope. Under such conditions it isnecessary to lower into the hole a string of fishing tools whichcomprise a device capable of engaging or gripping the rope-socket, andother devices connected with the gripping device and adapted for workingthe drilling tools upwardly in the hole. The lower member of the stringof fishing tools is known in the art as a slip-socket and the grippingdevice carried inside the slip-socket which takes hold of therope-socket is known as a slip."

My invention relates specifically to the construction of the slip andthe slip-socket.

A device embodying my invention is illustrated in the accompanyingdrawings, in which- Figure 1 is a vertical section in the plane of theoflset of the shank or pin of the socket, Fig. 2 is a vertical sectionin a plane at right angles to the plane of section of Fig. 1, Fig. 3 isan elevation of the socket from the side having the slotted wing, Fig.4c is a horizontal section on the line 03-;0 of Fig. 1, and Fig. 5 is ahorizontal section on the line y-y of Fig. 1.

In the drawings there is shown the upper part of the rope-socket 1 whichforms the upper member of the string of drilling tools and to which isconnected the drill-rope 2. My slip-socket when in use is passed downover the drill-rope, which is threaded through the socket before it islowered into the hole, and the drill-rope is held taut during thefishing operations. The lower portion or bowl 8 of the slip-socket has aflared opening at the bottom thereof to assist in guiding therope-socket into it, and within the upper part of the bowl are providedinclined seats to receive the jaws of the slip. The bowl is connectedwith the upper portion or head 4 by the wings 5, and the shank or pin 6is extended up from one side of the head above one of the wings, beingoffset sufliciently to bring one side thereof in line with the outsideof the wing. In the wing at the opposite side of the socket is avertical slot which extends from the bowl up to the head and enters thehead as far as the side of the pin 6. The width of the slot is slightlygreater than the diameter of the drill-rope. The slip comprises a pairof serrated j aws having the outer sides thereof shaped so as to enterthe seats therefor in the bowl of the socket, the jaws being carriedlike tongs at the lower ends of arms 7 which are integral with andconnected to each other at their upper ends by the laterally curved bar8. By the lateral curvature of the bar 8 of the slip, and the formationof the slot in the wing and head of the socket, the drill-rope 2 maypass directly up through the slip and socket so that the same may beworked over the rope without wearing or chafing the same.

In the use of the fishing devices for recovering tools which have beencaught and held in the hole through the caving-in of material abovethem, my slip-socket may be run down over the drill-rope without usingthe slip therein and worked down through the cavings until theropesocket is reached. Where a large amount of material is above thedrilling tools it may be necessary to occasionally withdraw theslip-socket from the hole and run down a bucket in order to bail out thematerial which has been worked loose by the socket. After theslip-socket has been Worked down to the rope-socket so as to pass overthe same, the slip-socket is withdrawn from the hole and the slip placedin position therein. Jars, or other suit able tools for working loosethe drilling tools after they are engaged by the slip, are con nectedwith the pin 6 of the slip-soclret and the string of fishing tools isthen lowered in the shaft until the rope-socket is engaged by the slip,after which the recovery of the drilling tools proceeds in the usualmanner.

Itwill be seen that by the use of the drillrope to guide the slip-socketdown over the rope-socket, the latter may be engaged and the drillingtools recovered even where through excessive caving the tools have gotout of the vertical line of the hole so that they could not be reachedby ordinary fish ing devices which necessitate the drill-rope being cutoff as the first ot the fishing operations. For recovering tools notconnected with a line my slip-socl et may be used in the same manner asthe ordinary slip-socket would be under similar conditions.

Now,having described my invention,what I claim and desire to secure byLetters Patent is:

1. In a device of the class described, the

combination with a slip having an upper connecting portion displacedlaterally from the plane of the jaws, of a slip-socket having anunobstructed vertical passage through the same for the purpose setforth.

2. In a device of the class described, the combination with a sliphaving an upper connecting portion displaced laterally from the plane ofthe jaws, of a slip-socket having an offset pin and a slot in the bodyof the socket disposed so as to complete a substantially verticalunobstructed central passage through the slip and socket, for thepurpose set forth. v

3. In a device of the class described, a slip having a laterally curvedupper portion, and a slip-socket comprising a bowl formed to receive thejaws of the slip, a head, Wings connecting the bowl and head, and a pinconnected with the head over one of the wings, the other wing beingslotted vertically and the slot extending into the head so that anunobstructed vertical passage is formed through the socket and slip.

In testimony whereof I have hereunto subscribed my name in the presenceof two witnesses.

L. E. NEBERGALL.

l/Vitnesses ROY Gr. KRATZ, DAVID O. BARNELL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

